a music store sold 35 vinyl records last month, 10 of which were rock albums. considering this data, how…

a music store sold 35 vinyl records last month, 10 of which were rock albums. considering this data, how many of the next 91 vinyl records sold should you expect to be rock albums? rock albums

a music store sold 35 vinyl records last month, 10 of which were rock albums. considering this data, how many of the next 91 vinyl records sold should you expect to be rock albums? rock albums

Answer

Answer:

26

Explanation:

Step1: Calculate the proportion of rock - albums

The proportion of rock - albums in the first batch is $\frac{10}{35}=\frac{2}{7}$.

Step2: Use the proportion to predict the number

Let $x$ be the number of rock - albums in the next 91 records. We set up a proportion: $\frac{x}{91}=\frac{2}{7}$. Cross - multiply gives $7x = 91\times2$. Then $x=\frac{91\times2}{7}=26$.